80分求一段js

我又两个页面
a.htm
b.htm点击a里边的链接,弹出b
在a里边，怎么得到b的状态（开启/已关闭）js这种效果该怎么写

解决方案 »

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a:
var bWin = window.open(b.htm);if(bWin.closed){
// b.htm窗口关闭了
}
a.html:<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
        <title>Insert title here</title>
    </head>
    <body>
     <p>This is a.html</p>
     <a href="b.html" target="_blank" class="link">link</a>
     <script>
     function setNewPageStatus(boolean){
     var link = document.getElementsByTagName('a')[0];
     if(boolean){
     var className = link.getAttribute('class');
     className = className ? className + ' clicked' : 'clicked';
     link.setAttribute('class', className);
     }else{
     if(link.className === 'clicked'){
     link.removeAttribute('className');
     }else{
     var className = link.getAttribute('class').replace(/ clicked|clicked /, '');
     link.setAttribute('class', className);
     }
     }
     }
     function getNewPageStatus(){
     var link = document.getElementsByTagName('a')[0],
     className = link.getAttribute('class');
     return className.indexOf('clicked') === -1 ? false : true;
     }
     function alertNewPageStatus(){
     alert(getNewPageStatus());
     }
     </script>
    </body>
</html>
b.html:<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
        <title>Insert title here</title>
    </head>
    <body>
     <p>This is b.html</p>
     <script>
     window.onload = function(){
     opener.setNewPageStatus(true);
     opener.alertNewPageStatus();
     }
     window.onunload = function(){
     opener.setNewPageStatus(false);
     opener.alertNewPageStatus();
     }
     </script>
    </body>
</html>
a.html:<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
        <title>Insert title here</title>
    </head>
    <body>
     <p>This is a.html</p>
     <a href="b.html" target="_blank" class="link">link</a>
     <script>
     function checkNewPageStatus(windowObj){
     if(windowObj.closed){
     alert("窗口已关闭");
     }else{
     alert("窗口已打开");
     }
     }
     </script>
    </body>
</html>
b.html<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
        <title>Insert title here</title>
    </head>
    <body>
     <p>This is b.html</p>
     <script>
     window.onload = function(){
     opener.checkNewPageStatus(this);
     }
     window.onunload = function(){
     opener.checkNewPageStatus(this);
     }
     </script>
    </body>
</html>
上面有点问题，蛋疼。。
a.html:<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
        <title>Insert title here</title>
    </head>
    <body>
     <p>This is a.html</p>
     <a href="b.html" target="_blank" class="link">link</a>
     <script>
     function checkNewPageStatus(windowObj){
     setTimeout(function(){
     if(windowObj.closed){
     alert("窗口已关闭");
     }else{
     alert("窗口已打开");
     }
     }, 100);
     }
     </script>
    </body>
</html>
b.html:<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
        <title>Insert title here</title>
    </head>
    <body>
     <p>This is b.html</p>
     <script>

     window.onload = function(){
     opener.checkNewPageStatus(this);
     }
     window.onunload = function(){
     opener.checkNewPageStatus(this);
     }
     </script>
    </body>
</html>
window.parent.function(value)看你什么时候传就什么时候调用父页面函数
1.在里面定义一个变量state
   var state = false;2.在弹出b窗口的时候,设置state=true3.在b窗口里面加入事件:
window.onunload=function(){
opener.state = false;
}
取state就可以b的状态（开启/已关闭）